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Telensa delivers world’s largest wireless street light control system to Essex County Council

- Telensa’s wireless sensors or telecells have been installed on 125,000 street lights across the county’s 12 districts providing centralised control and switching of lighting

- Telensa’s PLANet system instantly detects faulty street lights, delivers improved maintenance, lower carbon emissions and significant savings on energy bills

Great Chesterford, Essex, England, May 7, 2014 – Telensa’s market-leading wireless street lighting central management system (CMS) is now fully operational across the county of Essex, England, connecting 125,000 street lights to a central management system, delivering instant fault detection, improved maintenance, lower carbon emissions and significant energy savings.

Following the recent installation of the 125,000th wireless sensor or telecell to a street light, it is believed that Essex now boasts the world’s largest wireless street lighting central management system – with even more lights connected to their system than Los Angeles!

Essex-based company Telensa was awarded the GBP6.6m contract in 2011 and has delivered on time and on budget according to the County Council. Using Telensa’s PLANet (Public Lighting Active Network) system the council expects to reduce the energy cost of street lighting by around GBP1.3 million per annum at today’s prices and to cut carbon emissions by over 8,000 tons each year.

Essex County Councillor Rodney L Bass, Cabinet Member for Highways & Transportation said: “We are delighted to work with an Essex company to deliver a state-of-the-art control and monitoring system which is best in class and best in the world. Telensa’s system has fully met our expectations and has been deployed across the county’s 12 districts in two years and within budget.

“The new system will ensure that we manage the 125,000 street lights more efficiently and effectively to improve service levels while reducing energy costs and helping meet our carbon reduction targets. It also gives us the ability to manage lighting defects more effectively.”

The Telensa system allows the Essex Highways street lighting team to accurately control the switching of every single street light from a central location and provides daily reports on street lights that are not working allowing engineers to correct issues promptly when they occur.

The PLANet system also allows the flexibility to introduce initiatives such as part-night lighting where lights in certain areas are switched off for five hours overnight. This has been successfully implemented in several districts already.

Will Gibson, managing director, Telensa, said: “As an Essex-based company we are delighted that our system has been deployed in our home county and I am proud that Essex can now boast that it has the world’s largest street light central management system.

“Our system is used by scores of public authorities on hundreds of thousands of lights in the UK and abroad. The deployment in Essex demonstrates yet again that the Telensa system is cost-effective, the simplest to deploy and highly scalable across even large lighting population networks such as that found in Essex.”

Telensa’s patented ultra-narrow band (UNB) wireless CMS system accurately controls switching and dimming of street lights. It also measures energy and detects faulty street lights and helps local authorities and smart grid operators to deliver improved maintenance and significant savings on energy bills.

Telensa’s PLANet system comprises control and monitoring nodes (telecells) fitted to street lights which then connect wirelessly to a base station and onto a central system server. Each base station can accommodate up to 10,000 telecells over a range of 1-2 miles or 2-3km (urban) and 3-5 miles or 5-8km (rural). Wide area coverage is then achieved by linking these base stations in a cellular architecture creating networks of several hundred thousand lights across hundreds of square miles.

For more information about Telensa, please visit, telephone +44 (0) 1799 533200 or email

A photo of Will Gibson and Councillor Bass can be downloaded from the links below:

About Telensa (

Telensa, the market-leading ‘smart’ street lighting technology company, was established in 2005 to develop a telemanagement system for the street lighting industry based on Plextek’s patented ultra-narrow band (UNB) wireless technology. Through its PLANet (Public Lighting Active Network) system, Telensa serves the growing demands of street lighting and smart grid operators aiming to reduce energy and operating costs through automated management of the outdoor lighting inventory. Telensa is a Plextek Group company, a leading British design house and technology innovator, and is based at Great Chesterford on the outskirts of Cambridge, England.

Media contact:

Martin Brooke (for Telensa)
Martin Brooke Associates
Tel: +44 (0) 1223 882174
Tel: +44 (0) 7776 135402